add json list

2020/2020-01-31_gitTrainingBioTech/slides/list.json

 [
     { "filename": "index.md" },
     { "filename": "overview.md" },
+    { "filename": "what_is_git.md" },
+    { "filename": "github_gitlab.md" },
+    { "filename": "overview.md" },
+    { "filename": "configuration.md" },
+    { "filename": "overview.md" },
+    { "filename": "forks.md" },
+    { "filename": "overview.md" },
+    { "filename": "branches.md" },
+    { "filename": "overview.md" },
+    { "filename": "merge.md" },
+    { "filename": "overview.md" },
+    { "filename": "best_practices.md" },
     { "filename": "thanks.md" }
 ]