🚀(helm) prepare staging deployment

Thx @rouja for your help on deploying Desk. This commit slightly modifies
helm charts and helmfile to prepare the initial project deployment in a
staging environment.

@rouja updates:
- added secrets files for dev and staging environments (dev's one is empty)
- disable ingress by default, to avoid any security issue
- added an extra chart to benefit from Indie hoster Postgres operator

Thx to this commit we deployed a first draft version figured out
that the Django session were broken. We are using a cache session engine,
and wrongly configure cache backend to local memory. Thus, Django server
is not able to resolve the session, and enters in an infinite loop to
log-in the user.

src/helm/env.d/dev/secrets.enc.yaml

@@ -0,0 +1,66 @@
+empty: ""
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age:
+        - recipient: age15fyxdwmg5mvldtqqus87xspuws2u0cpvwheehrtvkexj4tnsqqysw6re2x
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAyTjRhME5rSXU4bGlzVXBu
+            ZS9WanpqRU1zUVJxM01Ld0NiYVR1ak5OZ2dJClRSSTJNSTdoTEQ2UzRVSlhRbDRx
+            NWxId2tsbUhFd0lOUUY4dTJTOG5tMW8KLS0tIDRpcThPaTkyQ005aXhqSnVTYkN2
+            LzhKU1FUeklTd1RuUk1lSVYwK3VLTEEKcKHaluWQ+Wgs9qI0qvyfnx+goSymL9wc
+            bJ0lxptRr0PGHdKhBRRlSe6HCMfshIoTktooUT6vNv4AsPmZuJZhJg==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age16hnlml8yv4ynwy0seer57g8qww075crd0g7nsundz3pj4wk7m3vqftszg7
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB5bEFSaS9TWmJ6MkRWd09J
+            TVdGTGN4SS9kVE5yMlRTUHBWK09pYVZpUTFVClJmZ1pVSm1XZFIxeXkrb2gxbTYy
+            eDVvT2RUNHBOWDRSa1Y1MkpxMGhzbDAKLS0tIEl2ZE1Bb0U4NGZ3QVg2ZUpRQ0o5
+            YUFNOS8xUnlKOXZSZ0M2ai8yNmNxTGsKHhwRXY18pGLitckX5vxFRJyqVL4VgWbw
+            +Gy+IwB7fJXoYlKHJXFfLOfhifCvrgouTcqV0ckPx/WYWSUKNDO89A==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age1g5keveae6zhn059e7cxkjqdz4v3u47ypejv9ujld65nwh6d5pd9qfm0ecv
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAwQnNWTC9TUHZZZ3JoUnBL
+            Vmh4OEwvNzVzUS9HVVpaT3lBWlllbFZsSzJnCmhCR0NDT0Q5ekFCSDdoclB4Sml3
+            ZjVnV1BpTkhmS0FUSDZmWGk4WGRrVGMKLS0tIGFCTUk1dzBaV1VBR0pLUGJtWDJh
+            RVd4K2Q0b2Vqc2F6b1hmQng1RHRheWcKOHUOZm+GjvHOKI3VRlgPeH3IKojGB9F4
+            YhkW83lF1Wl0XYnHEUya25bMSYLzQHOPiy2I7n4K45uk8hKQmrKE5w==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age12g6f5fse25tgrwweleh4jls3qs52hey2edh759smulwmk5lnzadslu2cp3
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBQbTAxQnJzc2xVZUh0VFBh
+            RUZiN3l6eHNLYzUyVVdqUVl5WjFBRW9uamhVCkRJM1hGWndXclNoVlMvcjQvZTlm
+            K3RxL2xrb0txZk1XaGlHTGRZbVFQemMKLS0tIFZaRkFQWURzcnRaV1lqTGhMTFp0
+            TTVNU2NnLzhlR0dTLzBkdThpeURWL28KHxERu5qGbXlZnTw9bHHe7AgCOZ3PI99R
+            91bVqvche0QPiESnu0Od4sIHID5g5F5+EBw53lQgjEx0c4Q1GFQfFQ==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age1tl80n23wq6zxegupwn70ew0yp225ua5v4dk800x7g2w6pvlxz46qk592pa
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBnQXlGVEJDTDlvTDI1RXAy
+            ZkZSN2NzVHNmb3U3N2xRQ3EyWmtaYmZyMEM0Cjh0QWh2ZUZycFVjbEJmdDNEK0pZ
+            MGFSTW13TkRmU1RkZzVvVTZpQkMvaW8KLS0tIE5JRUtOSHErSmtnN1krZFVEd2hs
+            OXNMaEc4ZUw0RW9qaHhiUVdIZVZrVlEKMBG7NyFXqT6zxwxIq30Nj+uWz/zhjbhU
+            y4JqomFHxzwySEQD/1rfnTIJpmgpJNbyvRo4ToLDsM3B8TWk6D7/MQ==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age1qy04neuzwpasmvljqrcvhwnf0kz5cpyteze38c8avp0czewskasszv9pyw
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSArMnFJMXR3SFBuTGt2TWdL
+            bUZMQkU3dTlYS0xqbW9xN3JrY28rWEtIcHpFCmUxbFBQYWgyM1dPOUtLVmEwWDJj
+            N1RtUkVVSHFmUWkyZFBndmhGeFgwc1kKLS0tIHNMSjVYemQyTUlqVGVtVlBHU2cx
+            eEh1MmhQRFNyNE1NSDdwWk5BRCtDMFUKZByCL2Wj0X+lwUo06PHwOiaJhzqOMVVt
+            Rj/pvynxLV4d0RBzwpgdL9uV8VzTED4GW9wotODbhEUtdlpSS1YOGg==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2024-03-15T15:03:15Z"
+    mac: ENC[AES256_GCM,data:szXSpToolZtr7f+36uEhmP/8P4SkBRpaI/tBbGUGm9bNC1gmiRGUqAU0Yye+HYEhpEQZAUBUyj+wXl3napn6d8reyHed96yTpXWw47tKFlfZo3vPEN4+33OQZ+Za+gr+ZexZkRVelX+O4h31joyw/3eQa/IRz9XPc1afOnOnWq8=,iv:yPfQRDagj5FJW/v4bd8G8CfznN8eNWPk/SUpq6Fyggs=,tag:UCeIeUG0At24YH+K+lKPTw==,type:str]
+    pgp: []
+    unencrypted_suffix: _unencrypted
+    version: 3.8.1

src/helm/env.d/dev/values.desk.yaml.gotmpl

@@ -42,6 +42,7 @@ frontend:
     tag: "latest"
 
 ingress:
+  enabled: true
   host: desk.127.0.0.1.nip.io