improve usability with Docker

Dockerfile

@@ -3,10 +3,12 @@ WORKDIR /app
 
 COPY ["package.json", "./"]
 COPY ["gulpfile.js", "./"]
-COPY ["app", "./app"]
 
 RUN npm install gulp -g
 RUN npm install
+
+COPY ["app", "./app"]
+
 RUN gulp build
 
-CMD ["gulp", "serve"]
+CMD ["gulp", "serve"]

README.md

@@ -86,11 +86,13 @@ A browser should launch viewing [https://localhost:3000](https://localhost:3000)
 
 ### Option 2: Use Docker
 
-1. docker build --tag devjava .
-1. docker run --publish 3000:3000 devjava
+1. `docker build --tag devjava .`
+1. `docker run --publish 3000:3000 --init -it --rm devjava`
 
 You should then be able to open a browser and visit [https://localhost:3000](https://localhost:3000)
 
+(For a more dynamic development experience avoiding a Docker build after every change, you can mount the local /app folder to the container by adding option `-v $PWD/app:/app/app` to your `docker run` command. Note: $PWD may not work in Windows.)
+
 
 ## Working with Content
 

gulpfile.js

@@ -415,10 +415,10 @@ function serve(done) {
         }
     });
 
-    watch("app/**/*.md", {}, series(build));
-    watch("app/**/*.html", {}, series(build));
-    watch("app/scss/*.scss", {}, series(build));
-    watch("site/**/", {}, browserSync.reload());
+    watch("app/**/*.md", {interval: 1000, usePolling: true}, series(build));
+    watch("app/**/*.html", {interval: 1000, usePolling: true}, series(build));
+    watch("app/scss/*.scss", {interval: 1000, usePolling: true}, series(build));
+    watch("site/**/", {interval: 1000, usePolling: true}, browserSync.reload());
     done();
 }