Docker build - Just for fun (#203)

* Adding files to run in docker

* Updating build and run scripts with usage

* Updating build and run scripts to check for docker

* Fixing commented code

* Added docker compose file and added instructions

Dockerfile.spud

@@ -0,0 +1,27 @@
+########### Phase 1 - Compile ###########
+FROM maven:3.9.8-eclipse-temurin-8-alpine AS potato-builder
+
+# Set the working directory and copy src
+WORKDIR /usr/src/Potato
+COPY . /usr/src/Potato/
+
+# Build with Maven
+RUN mvn clean install;
+
+########### Phase 2 - Package ###########
+FROM eclipse-temurin:21
+
+# Can be overridden with `docker run -e VEGAN="--vegan"`
+ENV VEGAN=""
+
+# Make am appropriate user name
+RUN useradd -u 500 mrpotatohead
+USER mrpotatohead
+
+WORKDIR /home/mrpotatohead
+
+# Cook this potato right every time
+COPY --from=potato-builder /usr/src/Potato/target /home/mrpotatohead/target
+
+# Allow user to pass in an argument when running the container
+CMD ["sh","-c","java -jar target/Potato.jar ${VEGAN}"]