Added more info on launching the container

Signed-off-by: James Ketrenos <james.p.ketrenos@intel.com>

README.md

@@ -3,6 +3,26 @@
 This project hosts a container demonstrating the use of ffmpeg
 using GPU offload for transcode operations.
 
+# Using
+
+Build the container:
+
+```bash
+docker build . -t intel-media-ffmpeg
+```
+
+Run the container:
+
+```bash
+docker run \
+  --rm \
+  --device=/dev/dri:/dev/dri \
+  -it \
+  intel-media-ffmpeg
+```
+
+## Developing
+
 The Dockerfile itself is constructed from re-usable snippets,
 located in the templates/ directory, and can be regenerated
 by running:
@@ -15,7 +35,11 @@ The above script uses environment substitution to stamp version
 information within the created Dockerfile. The files used are **SOLUTION**,
 and **MANIFEST**.
 
-# SOLUTION
+After building the template components, the file **Dockerfile.solution** is
+then added to the Dockerfile with environment substitution.
+
+
+## SOLUTION
 
 Solution specific definitions:
 
@@ -24,7 +48,7 @@ Solution specific definitions:
     OS_VERSION      is used as the OS version. Possible values: disco, eoan
 
 
-# MANIFEST
+## MANIFEST
 
 The version of MANIFEST was hard coded by reading the set of Agama packages
 on my local disk, sorting, and name-mangling them to be VERSION declarations.