Merge branch 'init' into 'master'

Init

See merge request !1

.gitlab-ci.yml

+image: 
+  name: $CI_REGISTRY/danet/internetworking/mdbook:latest
+  entrypoint:
+    - ''
+
+before_script:
+  - find . -name '*.dot' | xargs dot -T svg -O
+
+test:
+  stage: test
+  script:
+    - mdbook build --dest-dir public
+  rules:
+    - if: $CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH
+    
+# the 'pages' job will deploy and build your site to the 'public' path
+pages:
+  stage: deploy
+  script:
+    - mdbook build --dest-dir public
+  artifacts:
+    paths:
+      - public
+    expire_in: 1 week
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH  # this job will affect only the 'main' branch
\ No newline at end of file

SUMMARY.md

+# Summary
+
+* [da/net OER](README.md)
+    * [Lorem Ipsum](dummy/README.md)
+        * [dolor sit amet]()
+    * [Teaching]()
+        * [Internetworking Winter 2020]()
\ No newline at end of file

book.toml

+[book]
+authors = ["Manuel Kieweg"]
+language = "en"
+multilingual = false
+src = "."
+
+# [preprocessor.graphviz]
+# command = "mdbook-graphviz"
+
+[output.html]
+git-repository-url = "https://code.fbi.h-da.de/danet/internetworking"
+git-repository-icon = "fa-gitlab"
+site-url = "/public/"