feat(Dockerfile) adds docker file to containerized the example server (…

…#434)

* feat(Dockerfile) adds docker file to containerized the example server

Dockerizes the example server js for easier portability.
Fixes a bug in server.js so that empty logs are no longer
written out to the active JSON file buffer.

* expose port

---------

Co-authored-by: Jason Young <jason_y54@protonmail.com>

Dockerfile

@@ -0,0 +1,13 @@
+ARG BUILDPLATFORM=${BUILDPLATFORM:-amd64}
+FROM --platform=${BUILDPLATFORM} node:18-bullseye-slim AS flagon-node
+
+WORKDIR /app
+RUN --mount=type=bind,target=./package.json,src=./package.json \
+	--mount=type=bind,target=./package-lock.json,src=./package-lock.json \
+	npm ci 
+COPY ./src src/
+COPY ./example example/
+
+EXPOSE 8000
+
+CMD ["node", "example/server.js"]

example/server.js

@@ -66,6 +66,11 @@ app.get('/', function (req, res) {
 
 app.post('/', function (req, res) {
   const body = typeof req.body === "string" ? JSON.parse(req.body) : req.body
+
+  const isEmptyArray = (Array.isArray(body) && body.length === 0);
+  const isEmptyObject = (typeof body === 'object' && body !== null && Object.keys(body).length === 0);
+  if (isEmptyArray || isEmptyObject) return
+
   console.log(body)
 
   let delimiter = ',\n\t';