(socks-proxy) add healthcheck to dockerfile (#402)

Author: zeylos

src/socks-proxy/Dockerfile

@@ -6,7 +6,7 @@ ARG DANTE_SHA256=1973c7732f1f9f0a4c0ccf2c1ce462c7c25060b25643ea90f9b98f53a813fae
 
 RUN <<EOR
 apt-get update
-apt-get install -y build-essential curl
+DEBIAN_FRONTEND="noninteractive" apt-get install -y build-essential curl
 EOR
 
 RUN <<EOR
@@ -23,8 +23,9 @@ EOR
 FROM debian:trixie-slim AS runtime
 
 COPY --from=base /usr/local/sbin/sockd /usr/local/sbin/sockd
-
 COPY --chmod=0755 entrypoint.sh /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]
+HEALTHCHECK --interval=30s --timeout=3s --start-interval=5s \
+  CMD cat /proc/$(cat /var/run/sockd.pid)/status | grep State | grep -E 'R \(running\)|S \(sleeping\)'
 CMD ["/usr/local/sbin/sockd"]

src/socks-proxy/entrypoint.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+umask 0077
 
 if [ -z "${PROXY_USERS:-}" ]; then
   echo "Error: PROXY_USERS env var is not set (format: user1:pass1,user2:pass2)"
@@ -59,6 +60,5 @@ done
 
 # Replace the placeholder with the generated configuration
 echo "$DANTE_CONFIG" > /etc/sockd.conf
-chmod 0600 /etc/sockd.conf
 
 exec "$@"