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@@ -75,7 +75,10 @@ RUN set -eu && \
         chown -R 1000:1000 /var/lib/nginx /var/log/nginx /var/cache/nginx /var/run 2>/dev/null || \
             chmod -R 0777 /var/lib/nginx /var/log/nginx /var/cache/nginx /var/run || true && \
         mkdir -p /run/shm && touch /run/shm/websocketd.log && chown 1000:1000 /run/shm/websocketd.log 2>/dev/null || \
-            chmod 0666 /run/shm/websocketd.log || true
+            chmod 0666 /run/shm/websocketd.log || true && \
+        # Ensure nginx can create/open its pid file when running non-root
+        touch /run/nginx.pid && chown 1000:1000 /run/nginx.pid 2>/dev/null || \
+            chmod 0666 /run/nginx.pid || true
 
 COPY --chmod=755 ./src /run/
 COPY --chmod=755 ./web /var/www/

src/server.sh

@@ -46,7 +46,16 @@ if [[ "${WEB:-}" != [Nn]* ]]; then
   fi
 
   # Start webserver
-  nginx -e stderr
+  # Ensure nginx has a writable PID file: prefer /run/nginx.pid, otherwise use /run/shm/nginx.pid
+  mkdir -p /run /run/shm
+  PID_FILE="/run/nginx.pid"
+  if ! touch "$PID_FILE" 2>/dev/null || [ ! -w "$PID_FILE" ]; then
+    PID_FILE="/run/shm/nginx.pid"
+    mkdir -p "$(dirname "$PID_FILE")"
+    touch "$PID_FILE" 2>/dev/null || true
+  fi
+  info "Starting nginx with pid file: $PID_FILE"
+  nginx -g "pid $PID_FILE;" -e stderr
 
   # Start websocket server — write logs to /run/shm (writable in non-root mode)
   mkdir -p /run/shm