Fix missing "ps" terminal command (#944)

Fixes errors with invocations of "ps" terminal command

Author: dimon222

Dockerfile

@@ -58,7 +58,7 @@ LABEL org.opencontainers.image.source="https://github.com/IgnisDa/ryot"
 ENV FRONTEND_UMAMI_SCRIPT_URL="https://umami.diptesh.me/script.js"
 ENV FRONTEND_UMAMI_WEBSITE_ID="5ecd6915-d542-4fda-aa5f-70f09f04e2e0"
 COPY --from=caddy:2.7.5 /usr/bin/caddy /usr/local/bin/caddy
-RUN apt-get update && apt-get install -y --no-install-recommends curl ca-certificates && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends curl ca-certificates procps && rm -rf /var/lib/apt/lists/*
 RUN npm install --global concurrently@8.2.2 && concurrently --version
 RUN useradd -m -u 1001 ryot
 WORKDIR /home/ryot