feat: Updates to docker file and gh action

* Clean up Dockerfile
* Add health check to Dockerfile
* Update gh action versions

Dockerfile

@@ -7,13 +7,23 @@ RUN npm run generate
 
 ### STAGE 1: Build server ###
 FROM node:16-alpine
-RUN apk update && apk add --no-cache --update ffmpeg
 ENV NODE_ENV=production
+RUN apk update && \
+    apk add --no-cache --update \
+    curl \
+    tzdata \
+    ffmpeg
+
 COPY --from=build /client/dist /client/dist
-COPY index.js index.js
-COPY package-lock.json package-lock.json
-COPY package.json package.json
+COPY index.js package* /
 COPY server server
+
 RUN npm ci --only=production
+
 EXPOSE 80
+HEALTHCHECK \
+    --interval=30s \
+    --timeout=3s \
+    --start-period=10s \
+    CMD curl -f http://127.0.0.1/ping || exit 1
 CMD ["npm", "start"]