🧑‍💻(tilt) allow use of people as an IdP

Few fixes to allow the keycloak dev stack to use people
as an Identity Provider.
This requires the update of the bitnami keycloak chart we
use.

src/backend/people/settings.py

@@ -686,6 +686,24 @@ class Base(Configuration):
             # Ignore the logs added by the DockerflowMiddleware
             ignore_logger("request.summary")
 
+    @classmethod
+    def generate_temporary_rsa_key(cls):
+        """Generate a temporary RSA key for OIDC Provider."""
+
+        private_key = rsa.generate_private_key(
+            public_exponent=65537,
+            key_size=4096,
+        )
+
+        # - Serialize private key to PEM format
+        private_key_pem = private_key.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.TraditionalOpenSSL,
+            encryption_algorithm=serialization.NoEncryption(),
+        )
+
+        return private_key_pem.decode("utf-8")
+
 
 class Build(Base):
     """Settings used when the application is built.
@@ -732,6 +750,14 @@ class Development(Base):
         # pylint: disable=invalid-name
         self.INSTALLED_APPS += ["django_extensions"]
 
+    @property
+    def OAUTH2_PROVIDER(self):
+        """OAuth2 Provider settings."""
+        OAUTH2_PROVIDER = super().OAUTH2_PROVIDER  # pylint: disable=invalid-name
+        if not OAUTH2_PROVIDER["OIDC_RSA_PRIVATE_KEY"]:
+            OAUTH2_PROVIDER["OIDC_RSA_PRIVATE_KEY"] = Base.generate_temporary_rsa_key()
+        return OAUTH2_PROVIDER
+
 
 class Test(Base):
     """Test environment settings"""
@@ -895,6 +921,14 @@ class Local(Production):
     nota bene: it should inherit from the Production environment.
     """
 
+    @property
+    def OAUTH2_PROVIDER(self):
+        """OAuth2 Provider settings."""
+        OAUTH2_PROVIDER = super().OAUTH2_PROVIDER  # pylint: disable=invalid-name
+        if not OAUTH2_PROVIDER["OIDC_RSA_PRIVATE_KEY"]:
+            OAUTH2_PROVIDER["OIDC_RSA_PRIVATE_KEY"] = Base.generate_temporary_rsa_key()
+        return OAUTH2_PROVIDER
+
 
 class Staging(Production):
     """