Add docker build

Author: Dustin Masters

.dockerignore

@@ -0,0 +1,4 @@
+.git/
+node_modules/
+dist/
+*.generated.js

.github/main.workflow

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+workflow "Build, Test" {
+  on = "push"
+  resolves = ["Docker build"]
+}
+
+action "Docker build" {
+	uses = "actions/docker/cli@master"
+	args = "build . -f Dockerfile.mono"
+}

Dockerfile.mono

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+FROM node:10 AS node-build
+
+COPY . /app
+
+WORKDIR /app/src/React.Core
+
+RUN npm i
+RUN npm run build
+
+WORKDIR /app/src/React.Core/babel-legacy
+
+RUN npm i
+RUN npm run build
+
+WORKDIR /app/src/React.Sample.Webpack.CoreMvc
+
+RUN npm i
+RUN npm run build
+
+FROM mono:latest AS mono
+
+COPY . /app
+
+COPY --from=node-build /app/src/React.Core/Resources /app/src/React.Core/Resources
+
+RUN mono --version