improve debugging example (#84)

motivation: clearer examples as we prepare to open source

changes:
* rename debugging example to make the name more accurate
* add more information in the local debugging example
* add a Shared module to show how to share code between client and server
* make example more useful - use JSON for registration like flow
* add docker-compose task to test examples

Co-authored-by: Yim Lee <yim_lee@apple.com>

Author: tomerd

docker/docker-compose.1804.52.yaml

@@ -12,5 +12,8 @@ services:
   test:
     image: swift-aws-lambda:18.04-5.2
 
+  test-samples:
+    image: swift-aws-lambda:18.04-5.2
+
   shell:
     image: swift-aws-lambda:18.04-5.2

docker/docker-compose.1804.53.yaml

@@ -11,5 +11,8 @@ services:
   test:
     image: swift-aws-lambda:18.04-5.3
 
+  test-samples:
+    image: swift-aws-lambda:18.04-5.3
+
   shell:
     image: swift-aws-lambda:18.04-5.3

docker/docker-compose.yaml

@@ -30,6 +30,13 @@ services:
     <<: *common
     command: /bin/bash -cl "swift test --enable-test-discovery -Xswiftc -warnings-as-errors $${SANITIZER_ARG-}"
 
+  test-samples:
+    <<: *common
+    command: >-
+      /bin/bash -clx "
+      swift build --package-path Examples/LambdaFunctions &&
+      swift build --package-path Examples/LocalDebugging/MyLambda"
+
   # util
 
   shell: