Rename product to dockmv (container, image, module, env vars)

Container/image/service name, Go module path, CLI binary name, and
DOCKER_MIGRATE_* env vars still used the old working name; the project
is branded DockMV everywhere else (README, logo, Gitea repo).

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

internal/migrate/installer.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/arescom/docker-migrate/internal/spec"
+	"github.com/arescom/dockmv/internal/spec"
 )
 
 // renderInstaller generates the shell script shipped inside a migration
@@ -451,14 +451,14 @@ seed_readonly() { # container image destination relpath compressed
   store="$(resolve_mount "$1" "$3")" || { err "cannot resolve storage behind $3"; return 1; }
   base="${3##*/}"
   stage="dm-stage-$$-${RANDOM}"
-  mountat="/__docker_migrate/$base"
+  mountat="/__dockmv/$base"
   $DOCKER create --name "$stage" --volume "$store:$mountat" "$2" >/dev/null \
     || { err "could not create staging container for $3"; return 1; }
   local rc=0
   if [ "$5" = 1 ]; then
-    gzip -dc -- "$PKGDIR/$4" | $DOCKER cp -a - "$stage:/__docker_migrate" || rc=$?
+    gzip -dc -- "$PKGDIR/$4" | $DOCKER cp -a - "$stage:/__dockmv" || rc=$?
   else
-    $DOCKER cp -a - "$stage:/__docker_migrate" < "$PKGDIR/$4" || rc=$?
+    $DOCKER cp -a - "$stage:/__dockmv" < "$PKGDIR/$4" || rc=$?
   fi
   $DOCKER rm -f "$stage" >/dev/null 2>&1 || true
   if [ "$rc" != 0 ]; then

internal/migrate/installer_test.go

@@ -11,7 +11,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/arescom/docker-migrate/internal/spec"
+	"github.com/arescom/dockmv/internal/spec"
 )
 
 func buildPrepared(t *testing.T, c *spec.Container, vols []spec.Volume, nets []spec.Network) *Prepared {

internal/migrate/packager.go

@@ -15,9 +15,9 @@ import (
 	"strings"
 	"time"
 
-	"github.com/arescom/docker-migrate/internal/dkr"
-	"github.com/arescom/docker-migrate/internal/job"
-	"github.com/arescom/docker-migrate/internal/spec"
+	"github.com/arescom/dockmv/internal/dkr"
+	"github.com/arescom/dockmv/internal/job"
+	"github.com/arescom/dockmv/internal/spec"
 )
 
 // PackageFormat selects how the finished package is laid out on disk.
@@ -102,7 +102,7 @@ func (p *Packager) Run(ctx context.Context, j *job.Job) (*Result, error) {
 	man := spec.Manifest{
 		FormatVersion: 1,
 		CreatedAt:     time.Now(),
-		CreatedBy:     "docker-migrate",
+		CreatedBy:     "dockmv",
 		SourceHost:    p.SourceHost,
 		Options:       opts,
 		Items:         p.Plan.Items,

internal/migrate/prepare.go

@@ -8,7 +8,7 @@ import (
 	"path"
 	"strings"
 
-	"github.com/arescom/docker-migrate/internal/spec"
+	"github.com/arescom/dockmv/internal/spec"
 )
 
 // Prepared is one container resolved against the user's selection: the spec as
@@ -189,7 +189,7 @@ func Prepare(
 
 // StagingMountPath is where a read-only destination is mounted inside the
 // temporary staging container used to seed it.
-const stagingRoot = "/__docker_migrate"
+const stagingRoot = "/__dockmv"
 
 // StagingPaths returns the mount point and the extraction directory used when
 // seeding a read-only mount through a staging container. The volume is mounted

internal/migrate/prepare_test.go

@@ -4,7 +4,7 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/arescom/docker-migrate/internal/spec"
+	"github.com/arescom/dockmv/internal/spec"
 )
 
 func sample() *spec.Container {

internal/migrate/ssh.go

@@ -10,10 +10,10 @@ import (
 	"sync"
 	"time"
 
-	"github.com/arescom/docker-migrate/internal/dkr"
-	"github.com/arescom/docker-migrate/internal/job"
-	"github.com/arescom/docker-migrate/internal/spec"
-	"github.com/arescom/docker-migrate/internal/sshx"
+	"github.com/arescom/dockmv/internal/dkr"
+	"github.com/arescom/dockmv/internal/job"
+	"github.com/arescom/dockmv/internal/spec"
+	"github.com/arescom/dockmv/internal/sshx"
 )
 
 // SSHRunner migrates containers straight from the local daemon to a target