Added 'How to use this Image' to the appropriate README files.

gcc/README-content.md

@@ -4,3 +4,29 @@ The GNU Compiler Collection (GCC) is a compiler system produced by the GNU Proje
 > [wikipedia.org/wiki/GNU_Compiler_Collection](https://en.wikipedia.org/wiki/GNU_Compiler_Collection)
 
 # How to use this image
+
+## Start a gcc instance running your app
+
+For this image, the most straight-forward use is to use a gcc container as both the build environment as well as the runtime environment.
+
+    FROM gcc
+    ADD . /usr/src/myapp
+    WORKDIR /usr/src/myapp
+    RUN gcc -o myapp myapp.c
+    CMD ["./myapp"]
+
+Then run the commands to build and run the docker image.
+
+    docker build -t my-gcc-app .
+    docker run -it --rm --name my-running-app my-gcc-app ./myapp
+
+
+## Compile your app inside the docker
+
+It is not always appropriate to run your app inside a container. In instances where you only want to compile inside the docker instance, you can do something along the lines of the following.
+
+    docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp gcc gcc -o myapp myapp.c
+
+This will add your current directory as a volume to the comtainer, set the working directory to the volume, and run the command `gcc -o myapp myapp.c` which will tell gcc to compile the code in myapp.c and output the executable to myapp. Alternatively, if you have a make file, you can instead run the make command inside your container.
+
+    docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp make

gcc/README.md

@@ -5,6 +5,32 @@ The GNU Compiler Collection (GCC) is a compiler system produced by the GNU Proje
 
 # How to use this image
 
+## Start a gcc instance running your app
+
+For this image, the most straight-forward use is to use a gcc container as both the build environment as well as the runtime environment.
+
+    FROM gcc
+    ADD . /usr/src/myapp
+    WORKDIR /usr/src/myapp
+    RUN gcc -o myapp myapp.c
+    CMD ["./myapp"]
+
+Then run the commands to build and run the docker image.
+
+    docker build -t my-gcc-app .
+    docker run -it --rm --name my-running-app my-gcc-app ./myapp
+
+
+## Compile your app inside the docker
+
+It is not always appropriate to run your app inside a container. In instances where you only want to compile inside the docker instance, you can do something along the lines of the following.
+
+    docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp gcc gcc -o myapp myapp.c
+
+This will add your current directory as a volume to the comtainer, set the working directory to the volume, and run the command `gcc -o myapp myapp.c` which will tell gcc to compile the code in myapp.c and output the executable to myapp. Alternatively, if you have a make file, you can instead run the make command inside your container.
+
+    docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp make
+
 # Issues and Contributing
 
 We are always thrilled to receive pull requests, and do our best to process them as fast as possible. Not sure if that typo is worth a pull request? Do it! We will appreciate it.