Tighten course prerequisite chains across the Users/Developers tracks

- Use nf-core now explicitly requires Nextflow Run (previously implicit),
  with the audience description updated to match.
- Scale with Seqera now requires both Nextflow Run and Use nf-core,
  rather than only Use nf-core.
- Build with nf-core now requires both Hello Nextflow and Use nf-core,
  rather than only recommending the latter.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: vdauwera

docs/en/docs/hello_nf-core/index.md

@@ -16,7 +16,7 @@ additional_information:
   audience_prerequisites:
     - "**Audience:** This course is designed for learners who are already familiar with basic Nextflow and want to learn to use nf-core resources and best practices."
     - "**Skills:** Familiarity with the command line, basic scripting concepts and common file formats is assumed."
-    - "**Courses:** Must have completed the [Hello Nextflow](../hello_nextflow/index.md) course or equivalent. If you haven't yet run an nf-core pipeline, we also recommend completing [Use nf-core](../nfcore_run/index.md) first."
+    - "**Courses:** Must have completed [Hello Nextflow](../hello_nextflow/index.md) and [Use nf-core](../nfcore_run/index.md), or have equivalent experience."
     - "**Domain:** The exercises are all domain-agnostic, so no prior scientific knowledge is required."
 ---
 

docs/en/docs/nfcore_run/index.md

@@ -12,8 +12,9 @@ additional_information:
     - Understand how nf-core pipelines validate parameters and input data
     - Run a production-scale pipeline (nf-core/rnaseq) and override its default resource allocations
   audience_prerequisites:
-    - "**Audience:** This course is designed for learners who are new to Nextflow and nf-core and want to run existing community pipelines."
+    - "**Audience:** This course is designed for learners who already know how to run local Nextflow pipelines and are new to nf-core, and want to run existing community pipelines."
     - "**Skills:** Some familiarity with the command line, basic scripting concepts and common file formats is assumed."
+    - "**Courses:** Must have completed [Nextflow Run](../nextflow_run/index.md) or otherwise be comfortable running a local pipeline with `nextflow run`."
     - "**Domain:** The exercises use bioinformatics pipelines, but no prior scientific domain knowledge is required."
 ---
 

docs/en/docs/seqera_run/index.md

@@ -14,7 +14,7 @@ additional_information:
   audience_prerequisites:
     - "**Audience:** This course is designed for learners who want to run Nextflow pipelines at scale using Seqera Platform."
     - "**Skills:** Familiarity with running nf-core pipelines from the command line is assumed."
-    - "**Courses:** Must have completed [Use nf-core](../nfcore_run/index.md) or otherwise be comfortable running `nf-core/demo` and `nf-core/rnaseq`."
+    - "**Courses:** Must have completed [Nextflow Run](../nextflow_run/index.md) and [Use nf-core](../nfcore_run/index.md), or otherwise be comfortable running local and `nf-core/rnaseq` pipelines."
 ---
 
 # Scale with Seqera