Add validation doc (#937)

* Add validation doc

* Restructure

* Cleanup

docs/manual/indepth/validation.md

@@ -0,0 +1,82 @@
+# Validation
+
+Validation makes sure that your input is in the desired format, so the application can parse it without problems.
+Below you can find more info about which fields have the mentioned validation and what formats are accepted.
+
+### All Apps
+---
+
+#### Resources and Devices
+
+__`CPU`__
+Accepted formats are:
+
+- Plain integer (eg. `1`) - This means 1 hyperthread
+- Float (eg. `0.5`) - This means half hyperthread
+- Milicpu (eg. `500m`) This means also half hyperthread
+
+Regex used to match those: `^([0-9]+)(\.[0-9]?|m?)$`
+You can try live [here](https://regex101.com/r/pFoJTx/1)
+More detailed info can be found [here](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#meaning-of-cpu)
+
+__`Memory RAM`__
+Accepted formats are:
+
+- Suffixed with E, P, T, G, M, K (eg. `5G`) - This means 5Gigabyte of RAM
+- Suffixed with Ei, Pi, Ti, Gi, Mi, Ki (eg. `5Gi`) - This means 5Gibibyte of RAM
+- Plain integer (eg. `134217728`) - This means 128Megabyte of RAM
+- As an exponent format (eg. `134e6`) This means ~128Megabyte of RAM
+
+Regex uesd to match those: `^([0-9.]+)([EPTGMK]i?|[EPTGMK]?|e[0-9]+)$`
+You can try live [here](https://regex101.com/r/TUkZhN/1)
+More detailed info can be found [here](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#meaning-of-memory)
+
+
+### Per app validation
+
+---
+
+#### Appdaemon
+
+__`LATITUDE`__ and __`LONGITUDE`__
+Accepted formats are:
+
+- Float (eg. `24.2028`)
+
+Regex used to match this: `^[0-9]{1,}\.{1}[0-9]{1,}$`
+You can try live [here](https://regex101.com/r/xsLGWN/1)
+
+
+#### Collabora
+
+__`Domain(s) using collabora`__
+Accepted formats are:
+
+- Single domain (eg. `cloud\.mydomain\.com`) - Each `.` has to be escaped with `\`
+- Multiple domains (eg. `cloud\.mydomain\.com|nextcloud\.mydomain\.com`) - Each `.` has to be escaped with `\` and each domain is separated with `|`
+
+Regex used to match those: `^([a-z]{1,}\\{1}\.{1}[a-z]{1,}\\{1}\.{1}[a-z]{1,}\|{0,1})*$`
+You can try live [here](https://regex101.com/r/LK02xa/1)
+
+__`Password for WebUI`__
+Accepted formats are:
+
+- Letters, Numbers, Symbols, Minimum 8 characters (eg. `dg523$*a`) - It accepts `a-z`, `A-Z`, `0-9` and `!@#$%^&*?`
+
+Regex used to match those: `[a-zA-Z0-9!@#$%^&*?]{8,}`
+You can try live [here](https://regex101.com/r/ef3V88/1)
+
+
+#### Fireflyiii
+
+__`APP_KEY`__
+Accepted formats are:
+
+- Letters, Numbers, Symbols, Exactly 32 characters (eg. `!oqVA9o2@br#$6vAyk8LLrDm54X5EtjD`) - It accepts `a-z`, `A-Z`, `0-9` and `!@#$%^&*?`
+
+You can try live [here](https://regex101.com/r/OR879w/1)
+Regex used to match this: `[a-zA-Z0-9!@#$%^&*?]{32}`
+
+---
+
+_If you find a field that you think it needs validation, please open an issue on github_