30.11 update app-versioning.md

create lesson-6.md

Author: JavaScriptonit

Course/app-versioning.md

@@ -1,4 +1,4 @@
-### After local connection to AWS EC2 instance:
+### Application versioning:
 * `1 . 4 . 2` - Semantic numbering (Major . Minor . Patch)
 * `Major changes` - related to incompatible API changes
  * Replaced Framework
@@ -8,4 +8,22 @@
  * Bigger Bugfix
 * `Patch changes` - related to small bugfixes & changes, which are backward compatible
  * Small changes
- * Bugfix
+ * Bugfix
+
+### Dynamic Versioning:
+* Dynamically set an incremented version when we build the Docker image
+
+### Pass Env Vars as Dotenv Artifact:
+* Best practise when use 5 or more env variables
+* `Dotenv file` is a lightweight npm package that automatically loads 
+environment variables from a .env file into the process
+* Change in build_image:
+ * instead of `- echo $VERSION > version-file.txt`
+ * type `- echo "VERSION=$VERSION" >> build.env`
+* `Dotenv artifact` - Save the .env file as a dotenv artifact
+ * `artifacts: reports: dotenv: build.env`
+* Usage of these env vars:
+ * Collected variables are registered as runtime-created variables of the job
+ * Jobs in later stages can use the variable in scripts
+ * No need to `- export VERSION=$(cat version-file.txt)` in push_image or deploy_to_dev - auto export
+ * No need to download artifacts cause they are env variables already - auto export

Course/lesson-6.md

@@ -0,0 +1,4 @@
+## Build
+
+### Final:
+* Run