Add initial project structure with backend and frontend setup

- Created backend structure with Go, including main application logic and API endpoints.
- Added Docker support for both development and production environments.
- Introduced frontend using Nuxt 3 with Tailwind CSS for styling.
- Included configuration files for Docker and environment variables.
- Established basic documentation for contributing, development, and deployment processes.
- Set up .gitignore and .dockerignore files to manage ignored files in the repository.

frontend-nuxt/lib/Character.js

@@ -0,0 +1,61 @@
+import { HnHMaxZoom } from '~/lib/LeafletCustomTypes'
+import * as L from 'leaflet'
+
+export class Character {
+  constructor(characterData) {
+    this.name = characterData.name
+    this.position = characterData.position
+    this.type = characterData.type
+    this.id = characterData.id
+    this.map = characterData.map
+    this.marker = null
+    this.text = this.name
+    this.value = this.id
+    this.onClick = null
+  }
+
+  getId() {
+    return `${this.name}`
+  }
+
+  remove(mapview) {
+    if (this.marker) {
+      const layer = mapview.markerLayer ?? mapview.map
+      layer.removeLayer(this.marker)
+      this.marker = null
+    }
+  }
+
+  add(mapview) {
+    if (this.map === mapview.mapid) {
+      const position = mapview.map.unproject([this.position.x, this.position.y], HnHMaxZoom)
+      this.marker = L.marker(position, { title: this.name })
+      this.marker.on('click', this.callCallback.bind(this))
+      const targetLayer = mapview.markerLayer ?? mapview.map
+      this.marker.addTo(targetLayer)
+    }
+  }
+
+  update(mapview, updated) {
+    if (this.map !== updated.map) {
+      this.remove(mapview)
+    }
+    this.map = updated.map
+    this.position = updated.position
+    if (!this.marker && this.map === mapview.mapid) {
+      this.add(mapview)
+    }
+    if (this.marker) {
+      const position = mapview.map.unproject([updated.position.x, updated.position.y], HnHMaxZoom)
+      this.marker.setLatLng(position)
+    }
+  }
+
+  setClickCallback(callback) {
+    this.onClick = callback
+  }
+
+  callCallback(e) {
+    if (this.onClick != null) this.onClick(e)
+  }
+}