diff --git a/example/front/package-lock.json b/example/front/package-lock.json
index 14ed511..5980b38 100644
--- a/example/front/package-lock.json
+++ b/example/front/package-lock.json
@@ -1537,9 +1537,7 @@
           }
         },
         "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+          "version": "^1.2.5"
         },
         "minipass": {
           "version": "2.9.0",
@@ -1567,10 +1565,7 @@
           },
           "dependencies": {
             "minimist": {
-              "version": "1.2.5",
-              "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-              "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
-              "optional": true
+              "version": "^1.2.5"
             }
           }
         },
@@ -1703,15 +1698,12 @@
           "requires": {
             "deep-extend": "^0.6.0",
             "ini": "~1.3.0",
-            "minimist": "^1.2.0",
+            "minimist": "^1.2.5",
             "strip-json-comments": "~2.0.1"
           },
           "dependencies": {
             "minimist": {
-              "version": "1.2.5",
-              "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-              "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
-              "optional": true
+              "version": "^1.2.5"
             }
           }
         },
@@ -2017,7 +2009,7 @@
         "basic-auth": "^1.0.3",
         "colors": "^1.3.3",
         "corser": "^2.0.1",
-        "ecstatic": "^3.3.2",
+        "ecstatic": "^4.1.4",
         "http-proxy": "^1.17.0",
         "opener": "^1.5.1",
         "optimist": "~0.6.1",
@@ -2027,17 +2019,7 @@
       },
       "dependencies": {
         "ecstatic": {
-          "version": "4.1.4",
-          "resolved": "https://registry.npmjs.org/ecstatic/-/ecstatic-4.1.4.tgz",
-          "integrity": "sha512-8E4ZLK4uRuB9pwywGpy/B9vcz4gCp6IY7u4cMbeCINr/fjb1v+0wf0Ae2XlfSnG8xZYnE4uaJBjFkYI0bqcIdw==",
-          "requires": {
-            "charset": "^1.0.1",
-            "he": "^1.1.1",
-            "mime": "^2.4.1",
-            "minimist": "^1.1.0",
-            "on-finished": "^2.3.0",
-            "url-join": "^4.0.0"
-          }
+          "version": "^4.1.4"
         },
         "mime": {
           "version": "2.4.4",
@@ -2274,13 +2256,11 @@
       "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.1.tgz",
       "integrity": "sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==",
       "requires": {
-        "minimist": "^1.2.0"
+        "minimist": "^1.2.5"
       },
       "dependencies": {
         "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+          "version": "^1.2.5"
         }
       }
     },
@@ -2446,9 +2426,7 @@
       }
     },
     "minimist": {
-      "version": "1.2.5",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+      "version": "^1.2.5"
     },
     "mississippi": {
       "version": "3.0.0",
@@ -2495,9 +2473,7 @@
       },
       "dependencies": {
         "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+          "version": "^1.2.5"
         }
       }
     },
@@ -2678,14 +2654,12 @@
       "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
       "integrity": "sha1-2j6nRob6IaGaERwybpDrFaAZZoY=",
       "requires": {
-        "minimist": "~0.0.1",
+        "minimist": "^1.2.5",
         "wordwrap": "~0.0.2"
       },
       "dependencies": {
         "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+          "version": "^1.2.5"
         }
       }
     },
@@ -3890,4 +3864,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index 119d481..d45509b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2472,6 +2472,11 @@ chardet@^0.7.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
   integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
 
+charset@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/charset/-/charset-1.0.1.tgz#8d59546c355be61049a8fa9164747793319852bd"
+  integrity sha512-6dVyOOYjpfFcL1Y4qChrAoQLRHvj2ziyhcm0QJlhOcAhykL/k1kTUPbeo+87MNRTRdk2OIIsIXbuF3x2wi5EXg==
+
 chokidar@^2.1.8:
   version "2.1.8"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.1.8.tgz#804b3a7b6a99358c3c5c61e71d8728f041cff917"
@@ -3196,15 +3201,17 @@ ecc-jsbn@~0.1.1:
     jsbn "~0.1.0"
     safer-buffer "^2.1.0"
 
-ecstatic@^3.3.2:
-  version "3.3.2"
-  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-3.3.2.tgz#6d1dd49814d00594682c652adb66076a69d46c48"
-  integrity sha512-fLf9l1hnwrHI2xn9mEDT7KIi22UDqA2jaCwyCbSUJh9a1V+LEUSL/JO/6TIz/QyuBURWUHrFL5Kg2TtO1bkkog==
+ecstatic@^3.3.2, ecstatic@^4.1.4:
+  version "4.1.4"
+  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-4.1.4.tgz#86bf340dabe56c4d0c93d406ac36c040f68e1d79"
+  integrity sha512-8E4ZLK4uRuB9pwywGpy/B9vcz4gCp6IY7u4cMbeCINr/fjb1v+0wf0Ae2XlfSnG8xZYnE4uaJBjFkYI0bqcIdw==
   dependencies:
+    charset "^1.0.1"
     he "^1.1.1"
-    mime "^1.6.0"
+    mime "^2.4.1"
     minimist "^1.1.0"
-    url-join "^2.0.5"
+    on-finished "^2.3.0"
+    url-join "^4.0.0"
 
 ee-first@1.1.1:
   version "1.1.1"
@@ -5205,11 +5212,16 @@ mime-types@^2.1.12, mime-types@~2.1.19, mime-types@~2.1.24:
   dependencies:
     mime-db "1.44.0"
 
-mime@1.6.0, mime@^1.6.0:
+mime@1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
   integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
 
+mime@^2.4.1:
+  version "2.4.4"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.4.tgz#bd7b91135fc6b01cde3e9bae33d659b63d8857e5"
+  integrity sha512-LRxmNwziLPT828z+4YkNzloCFC2YM4wrB99k+AV5ZbEyfGNWfG8SO1FUXLmLDBSo89NrJZ4DIWeLjy1CHGhMGA==
+
 mimic-fn@^1.0.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.2.0.tgz#820c86a39334640e99516928bd03fca88057d022"
@@ -5681,7 +5693,7 @@ octokit-pagination-methods@^1.1.0:
   resolved "https://registry.yarnpkg.com/octokit-pagination-methods/-/octokit-pagination-methods-1.1.0.tgz#cf472edc9d551055f9ef73f6e42b4dbb4c80bea4"
   integrity sha512-fZ4qZdQ2nxJvtcasX7Ghl+WlWS/d9IgnBIwFZXVNNZUmzpno91SX5bc5vuxiuKoCtK78XxGGNuSCrDC7xYB3OQ==
 
-on-finished@~2.3.0:
+on-finished@^2.3.0, on-finished@~2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"
   integrity sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=
@@ -7593,10 +7605,10 @@ urix@^0.1.0:
   resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
   integrity sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=
 
-url-join@^2.0.5:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/url-join/-/url-join-2.0.5.tgz#5af22f18c052a000a48d7b82c5e9c2e2feeda728"
-  integrity sha1-WvIvGMBSoACkjXuCxenC4v7tpyg=
+url-join@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/url-join/-/url-join-4.0.1.tgz#b642e21a2646808ffa178c4c5fda39844e12cde7"
+  integrity sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA==
 
 url-parse-lax@^1.0.0:
   version "1.0.0"