Move building to krankerl

Signed-off-by: Julius Härtl <jus@bitgrid.net>

krankerl.toml

@@ -0,0 +1,25 @@
+[package]
+exclude = [
+    "build/",
+    ".git",
+    "js/tests",
+    "js/node_modules",
+    "tests",
+    ".codecov.yml",
+    "composer.json",
+    "composer.lock",
+    "_config.yml",
+    ".drone.yml",
+    ".eslintignore",
+    ".eslintrc.yml",
+    ".gitignore",
+    "issue_template.md",
+    "krankerl.toml",
+    "Makefile",
+    "run-eslint.sh"
+]
+
+before_cmds = [
+    'make clean-build',
+    'make build'
+]