fix: switch freeform DDEV router to port 8080, fix coder-routes and ddev launch, fixes #87

[rfay]

Summary

• Set ddev config global --router-http-port=8080 in freeform startup script; port 80 conflicts with Coder's own proxy and is excluded from auto port-forwarding
• Update coder_app.ddev-web to port 8080 (url and healthcheck)
• coder-routes: detect web service on ext_port 8080 (was 80); sanitize DDEV project name as DNS-safe PROJECT_SLUG for per-project URL differentiation; write per-project coder-routes-{project}.yaml files so multiple projects coexist without overwriting
• launch: remove hardcoded wrong-format URL; read all routes from per-project coder-routes file and derive correct URLs from Host/PathPrefix rules; falls back to legacy coder-routes.yaml for existing setups
• coder-setup: add post-stop hook to remove per-project routes file on project stop

Closes #87

Test plan

• Start a freeform workspace and verify DDEV starts on port 8080
• Confirm the ddev-web app in Coder dashboard opens the site correctly
• Run ddev coder-routes and verify coder-routes-{project}.yaml is created
• Run ddev launch and verify correct URLs are printed/opened
• Stop project and verify per-project routes file is removed
• Test with multiple DDEV projects in same workspace to confirm no route file overwriting

🤖 Generated with Claude Code

[rfay]

Multi-project routing design notes

While working on this PR we researched how Coder constructs workspace URLs and identified the path to supporting multiple concurrent DDEV projects in one workspace. Notes here for future reference.

How Coder subdomain URLs are built

For a coder_app with subdomain = true and a single agent (the normal case):

https://{slug}--{workspace}--{owner}.{wildcard-domain}/

For dashboard port-forwarding (no coder_app declaration needed):

https://{port}--{agent}--{workspace}--{owner}.{wildcard-domain}/

Where {agent} is the Terraform resource label on coder_agent — in this template that's always main.

The Coder docs don't document the named-app URL pattern in one place; the closest reference is coder.com/docs/admin/networking/wildcard-access-url.

Why multi-project is currently one-at-a-time

The freeform template has one coder_app with slug = workspace_name. coder-routes always constructs the primary web URL as {workspace}--{workspace}--{owner}.{domain}, so whichever DDEV project ran last wins that URL.

Recommended approach for multi-project support

Use a mutable Terraform parameter for comma-separated project names and generate coder_app resources via for_each:

data "coder_parameter" "project_names" {
  name         = "project_names"
  display_name = "DDEV project names"
  description  = "Comma-separated DDEV project names. Each gets its own app button and URL."
  default      = data.coder_workspace.me.name
  type         = "string"
  mutable      = true
}

locals {
  project_names = [for s in split(",", data.coder_parameter.project_names.value) : trimspace(s)]
}

resource "coder_app" "ddev_web" {
  for_each     = toset(local.project_names)
  agent_id     = coder_agent.main.id
  slug         = each.key
  display_name = each.key
  url          = "http://localhost:8080"
  subdomain    = true
  share        = "owner"
}

All apps point to http://localhost:8080 (ddev-router). ddev-router routes by Host: header — each coder_app gets a different subdomain, and ddev-router dispatches to the right DDEV container.

The naming contract: the DDEV project name must equal the coder_app slug. coder-routes derives the Traefik Host() rule from the DDEV project name, so drupal → Host(\drupal--myworkspace--rfay.coder.ddev.com`)which matches the URL Coder generates forslug = "drupal"`. No extra configuration needed; names just have to align.

Single-project users: the default is the workspace name and ddev config defaults the project name to the directory name, so naming the project directory after the workspace keeps everything aligned without any thought.

Adding a second project later: because mutable = true, users can edit the parameter via the Coder dashboard or coder update myworkspace, add a name, and Coder runs terraform apply to add the new coder_app — no rebuild, no data loss.