Resolve "[BACK] Créer la route pour la liste des bars"

Closes #1 (closed)

models/bar.model.js

+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+
+const barSchema = Schema({
+	shortname: String,
+	longname: String,
+	description: String,
+	adress: String,
+	logo: String,
+});
+
+const Bar = mongoose.model('Bar', barSchema);
+
+module.exports = Bar;
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