Refactor Dockerfile-openresty to improve readability by grouping commands and adding comments.

Dockerfile-openresty

@@ -1,11 +1,16 @@
 FROM openresty/openresty:latest
 
+# Install system packages
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         git \
         curl \
-        luarocks && \
-    luarocks install lua-resty-openidc && \
-    luarocks install lua-resty-session && \
-    luarocks install lua-cjson && \
-    rm -rf /var/lib/apt/lists/*
+        luarocks
+
+# Install Lua packages
+RUN luarocks install lua-resty-openidc
+RUN luarocks install lua-resty-session
+RUN luarocks install lua-cjson
+
+# Clean up
+RUN rm -rf /var/lib/apt/lists/*