Added Development.md

Author: linus-berg

Development.md

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+# Development environment
+### Docker compose
+Run the external services in the Compose folder with
+`docker compose up`.
+This will setup the required external services required to run the APC framework.
+
+### Keycloak (required for GUI & API)
+Create a client in keycloak named `apc`.
+Create a role for the client called `Administrator`.
+
+Export the configuration and place it in the root of `APC.Api`.
+The configuration should look something like this:
+
+```json
+{
+  "realm": "master",
+  "auth-server-url": "http://localhost:8090",
+  "ssl-required": "external",
+  "resource": "apc",
+  "public-client": true,
+  "verify-token-audience": false,
+  "use-resource-role-mappings": true,
+  "confidential-port": 0
+}
+```
+