feat(miniflux): Add doc and update questions (#15249)

**Description**
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Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context. List any dependencies that
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⚒️ Fixes  #15248 

**⚙️ Type of change**

- [x] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
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Custom catalog generated on top of the changes made in the PR and I was
able to install it via TrueNAS UI.

**📃 Notes:**
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According to new policy to not mirror every container, the upstream
container will be used.

I propose to change the category to rss as I feel it is more fitted
there.

As the changes brings breaking changes and data loss if upgraded as is
(switch from postgresql chart to cnpg operator), a breaking change note
has been added to the changelog file and git commit. I don't know if
there is a better way to announce it to avoid users data loss.

**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [x] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [x] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

_Please don't blindly check all the boxes. Read them and only check
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---------

Signed-off-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Co-authored-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>

charts/stable/miniflux/Chart.yaml

@@ -1,7 +1,7 @@
 kubeVersion: ">=1.24.0-0"
 apiVersion: v2
 name: miniflux
-version: 12.0.7
+version: 12.0.9
 appVersion: 2.0.51
 description: Miniflux is a minimalist and opinionated feed reader.
 home: https://truecharts.org/charts/incubator/miniflux
@@ -31,8 +31,8 @@ annotations:
     max_scale_version: 23.10.2
     min_scale_version: 23.10.0
     truecharts.org/SCALE-support: "true"
-  truecharts.org/category: media
+    truecharts.org/category: rss
     truecharts.org/max_helm_version: "3.13"
     truecharts.org/min_helm_version: "3.12"
-  truecharts.org/train: incubator
+    truecharts.org/train: stable
 type: application

charts/stable/miniflux/docs/credentials.md

@@ -0,0 +1,4 @@
+# Default Username/Password
+
+- **Username**: `admin`
+- **Password**: `changeme`

charts/stable/miniflux/docs/installation_notes.md

@@ -0,0 +1,8 @@
+# Installation Notes
+
+- Set `BASE_URL` to **http://scale_ip:APP_PORT/** and then login using the default [credentials](./credentials.md).
+  - If you plan to use ingress and a domain you need to:
+    - Set `BASE_URL` to **https://app.mydomain.tld/**
+    - Configure ingress on the app
+
+Refer to [Miniflux documentation](https://miniflux.app/docs/configuration.html) for more advance configuration.

charts/stable/miniflux/questions.yaml

@@ -17,6 +17,12 @@ questions:
                                     additional_attrs: true
                                     type: dict
                                     attrs:
+                                      - variable: BASE_URL
+                                        label: "BASE_URL"
+                                        description: "Base URL to generate HTML links and base path for cookies."
+                                        schema:
+                                          type: string
+                                          default: ""
                                       - variable: ADMIN_USERNAME
                                         label: "ADMIN_USERNAME"
                                         description: "Sets the ADMIN_USERNAME env var"
@@ -30,18 +36,6 @@ questions:
                                           type: string
                                           default: "changeme"
                                           private: true
-                                      - variable: RUN_MIGRATIONS
-                                        label: "RUN_MIGRATIONS"
-                                        description: "Sets the RUN_MIGRATIONS env var"
-                                        schema:
-                                          type: int
-                                          default: 1
-                                      - variable: CREATE_ADMIN
-                                        label: "CREATE_ADMIN"
-                                        description: "Sets the CREATE_ADMIN env var"
-                                        schema:
-                                          type: int
-                                          default: 1
 # Include{containerBasic}
 # Include{containerAdvanced}
 # Include{containerConfig}