Add initial support for solr

internal/dis/component/solr/solr.env

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+DOCKER_NETWORK_NAME=${DOCKER_NETWORK_NAME}

internal/dis/component/solr/solr.go

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+package solr
+
+import (
+	"context"
+	"embed"
+	"path/filepath"
+	"time"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/pkg/environment"
+)
+
+type Solr struct {
+	component.Base
+
+	BaseURL string // upstream solr url
+
+	PollContext  context.Context // context to abort polling with
+	PollInterval time.Duration   // duration to wait for during wait
+}
+
+func (s *Solr) Path() string {
+	return filepath.Join(s.Still.Config.DeployRoot, "core", "solr")
+}
+
+func (*Solr) Context(parent component.InstallationContext) component.InstallationContext {
+	return parent
+}
+
+//go:embed all:solr
+//go:embed solr.env
+var resources embed.FS
+
+func (solr *Solr) Stack(env environment.Environment) component.StackWithResources {
+	return component.MakeStack(solr, env, component.StackWithResources{
+		Resources:   resources,
+		ContextPath: "solr",
+
+		EnvPath: "solr.env",
+		EnvContext: map[string]string{
+			"DOCKER_NETWORK_NAME": solr.Config.DockerNetworkName,
+		},
+
+		MakeDirs: []string{
+			filepath.Join("data"),
+		},
+	})
+}

internal/dis/component/solr/solr/docker-compose.yml

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+version: "3.7"
+
+services:
+    solr:
+        image: docker.io/library/solr:8.11-slim
+        ports:
+            - "127.0.0.1:8983:8983"
+        volumes:
+            - './data/:/var/solr'
+        labels:
+            - "eu.wiss-ki.barrel.distillery=${DOCKER_NETWORK_NAME}"
+
+        restart: always
+
+networks:
+    default:
+        name: ${DOCKER_NETWORK_NAME}
+        external: true