Add template and number prefix to ADRs docs

docs/adrs/template.md

@@ -0,0 +1,74 @@
+# [short title of solved problem and solution]
+
+- Status: [proposed | rejected | accepted | deprecated | … | superseded by
+  [ADR-0005](0005-example.md)] <!-- optional -->
+- Date: [YYYY-MM-DD when the decision was last updated] <!-- optional -->
+
+Tracking issue: [ticket/issue URL] <!-- optional -->
+
+## Context and Problem Statement
+
+[Describe the context and problem statement, e.g., in free form using two to
+three sentences. You may want to articulate the problem in form of a question.]
+
+## Decision Drivers <!-- optional -->
+
+- [driver 1, e.g., a force, facing concern, …]
+- [driver 2, e.g., a force, facing concern, …]
+- … <!-- numbers of drivers can vary -->
+
+## Considered Options
+
+1. [option 1]
+2. [option 2]
+3. [option 3]
+4. … <!-- numbers of options can vary -->
+
+## Decision Outcome
+
+Chosen option: "[option 1]", because [justification. e.g., only option, which
+meets k.o. criterion decision driver | which resolves force force | … | comes
+out best (see below)].
+
+### Positive Consequences <!-- optional -->
+
+- [e.g., improvement of quality attribute satisfaction, follow-up decisions
+  required, …]
+- …
+
+### Negative Consequences <!-- optional -->
+
+- [e.g., compromising quality attribute, follow-up decisions required, …]
+- …
+
+## Pros and Cons of the Options <!-- optional -->
+
+### Option 1 - …
+
+[example | description | pointer to more information | …] <!-- optional -->
+
+- Good, because [argument a]
+- Bad, because [argument b]
+- … <!-- numbers of pros and cons can vary -->
+
+### Option 2 - …
+
+[example | description | pointer to more information | …] <!-- optional -->
+
+- Good, because [argument a]
+- Bad, because [argument b]
+- … <!-- numbers of pros and cons can vary -->
+
+### Option 3 - …
+
+[example | description | pointer to more information | …] <!-- optional -->
+
+- Good, because [argument a]
+- Bad, because [argument b]
+- … <!-- numbers of pros and cons can vary -->
+
+## Links <!-- optional -->
+
+- [Link type] [Link to ADR]
+  <!-- example: Refined by [ADR-0005](0005-example.md) -->
+- … <!-- numbers of links can vary -->