Minimal CCF container (#7164)

Co-authored-by: Amaury Chamayou <[email protected]>

Author: chinenyeokafor

samples/minimal_ccf/README.md

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+# Minimal CCF Runtime Image
+
+This repository provides scripts and Dockerfiles to build a minimal CCF runtime image and a sample application image based on it.
+
+## Structure
+
+- **ccf_runtime/**: Contains a Dockerfile to build a minimal CCF runtime image with only the required dependencies.
+- **myapp/**: Contains a Dockerfile to build a sample application image using the `ccf_runtime` image as its base.
+- **use_minimal_ccf.sh**: Script to build sample application image in a container.
+- **run_app.sh**: Script to run the sample application in a container.
+
+## Usage
+
+Run `use_minimal_ccf.sh` to build the images and start the sample application.