add pre-script to check if webapp was compiled or sources changed and auto compile.
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Co-authored-by: Bernhard Kirchen <schlimmchen@posteo.net>
Personal edits in platformio.ini causes annoying merge conflicts then
new commits are pulled from upstream. Adding an personal override config
which is further ignored from git will avoid this.
Signed-off-by: Martin Dummer <martin.dummer@gmx.net>
