Added drone config

.drone.yml

@@ -0,0 +1,48 @@
+---
+kind: pipeline
+type: kubernetes
+name: rename-server-build
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+- name: build
+  image: docker.zvon.tech/cppbuilder:v0.09
+  commands:
+  - export CXX=g++
+  - cmake .
+  - cmake --build .
+- name: coverage
+  image: docker.zvon.tech/cppbuilder:v0.09
+  commands:
+  - ./test
+  - "find . -type f -name \"*.gcno\" -execdir gcov -pb -r {} +"
+  - "gcovr --root . -k -j 2 --xml -o gcovr_report.xml --exclude-directories \"tests\""
+  - bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r "gcovr_report.xml" --language CPP --force-language
+  environment:
+    CODACY_PROJECT_TOKEN:
+      from_secret: project_token
+  when:
+    status:
+    - success
+- name: formatting-check
+  image: docker.zvon.tech/cppbuilder:v0.09
+  commands:
+  - find .  -path "./build" -prune -or -path "./.cache" -prune -or -iname "*.cpp" -or -iname "*.hpp" -print | xargs -P0 -I{} clang-format -style=file --dry-run -Werror {}
+  when:
+    status:
+    - failure
+    - success
+- name: notify
+  image: docker.zvon.tech/drone-email:v0.01
+  settings:
+    host: mail.zvon.tech
+    username:
+      from_secret: email_user
+    password:
+      from_secret: email_password
+    port: 465
+    from: Drone <drone@zvon.tech>
+  when:
+    status: [ changed, failure ]