Update Dockerfile

Dockerfile

@@ -1,10 +1,21 @@
 FROM postgres:latest
 
-RUN mkdir -p /.postgresql/data && \
-    chown -R postgres: /.postgresql/data
+RUN useradd -m -u 1000 user
 
 ENV POSTGRES_PASSWORD=kogakisaki \
-    PGDATA=/.postgresql/data
+    POSTGRES_USER=user \
+    PGDATA=/.postgresql/data \
+    HOME=/home/user \
+	PATH=/home/user/.local/bin:$PATH
+
+WORKDIR $HOME/app
+
+RUN mkdir -p ./.postgresql/data && \
+    chown -R user: ./.postgresql/data
+
+COPY --chown=user . $HOME/app
+
+USER user
 
 EXPOSE 5432