Update requirements

Author: nilmerg

.github/workflows/php.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0', '8.1']
+        php: ['7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
         os: ['ubuntu-latest']
 
     steps:

doc/02-Installation.md

@@ -1,8 +1,8 @@
-# Installation <a id="installation"></a>
+# Installation
 
-## Requirements <a id="installation-requirements">
+## Requirements
 
-* PHP (>= 7.2)
+* PHP (>= 7.0)
 * MySQL / MariaDB or PostgreSQL
 * [Icinga Web 2](https://github.com/Icinga/icingaweb2) (>= 2.7)
 * [Icinga PDF Export](https://github.com/Icinga/icingaweb2-module-pdfexport) (>= 0.10)
@@ -12,7 +12,7 @@ If your Icinga Web 2 is **not** v2.9+, the following modules are also required:
 * [reactbundle](https://github.com/Icinga/icingaweb2-module-reactbundle) (0.9.0)
 * [Icinga PHP Library (ipl)](https://github.com/Icinga/icingaweb2-module-ipl) (0.5.0)
 
-## Database Setup <a id="installation-database-setup">
+## Database Setup
 
 ### MySQL / MariaDB